High-Purity Kieserite Fertilizer & Magnesium Sulphate Monohydrate Manufacturer

Tianjin Xingyu Fertilizer Co., Ltd. is a world-class Kieserite fertilizer manufacturer and exporter with nearly three decades of expertise in agricultural nutrient production. Operating from our advanced 20,000 m² manufacturing facility, we produce up to 300,000 metric tons of premium Magnesium Sulphate Monohydrate annually. We are dedicated to providing global agricultural distributors, commercial plantation operators, and fertilizer blenders with reliable, high-grade Kieserite products designed for optimal soil nutrition.

Understanding Kieserite: The Ideal Slow-Release Magnesium & Sulfur Fertilizer

Kieserite (MgSO4·H2O) is a natural mineral fertilizer containing high concentrations of essential magnesium and sulfur. Unlike highly soluble magnesium hydrates, Kieserite provides a controlled, sustained release rate that minimizes soil nutrient leaching, particularly in acidic soils, sandy soils, and high-rainfall tropical regions.

Magnesium serves as the core central element of chlorophyll, vital for driving crop photosynthesis and energy transformation. Sulfur is indispensable for amino acid synthesis, enzyme activation, and boosting overall crop disease resistance. Incorporating Kieserite ensures a long-lasting nutrient supply that accelerates root formation and boosts final harvest yields.

Key Product Features & B2B Strengths

• High Nutrient Density: Contains high concentration of Magnesium Oxide (MgO) and Sulfur (S), reducing transportation and storage costs per unit of active nutrient.

• Low Leaching Risk: Excellent slow-release property makes it the premier choice for long-cycle cash crops and palm oil plantations.

• Flexible Granulation Options: Available in fine powder, micro-granular, and compacted 2-5mm uniform round granules, perfect for bulk blending (BB fertilizer) or direct mechanical spreading.

• Certified Factory Quality: Fully compliant with ISO 9001 standards. Every export batch undergoes stringent lab testing and comes with a COA, supporting SGS, BV, and CCIC inspections upon request.

Technical Specifications Overview

• Product Name: Kieserite / Magnesium Sulphate Monohydrate (Agricultural Grade)

• Chemical Formula: MgSO4·H2O

• Total MgO Content: 25% - 27% Min

• Water Soluble MgO: 20% - 22% Min

• Sulfur (S) Content: 16% - 20% Min

• Physical Form: Off-white Granular or White Powder

• Granule Size: 2mm - 5mm (Granular) / 80-100 Mesh (Powder)

• Packaging Solutions: 25kg, 50kg PP/PE woven bags, 1000kg/1250kg Jumbo Bags, Custom OEM Packaging available

Primary Applications Across Global Agricultural Markets

Our agricultural Kieserite is widely utilized across various agricultural and industrial sectors:

• Commercial Plantations: Extensively applied in oil palm, rubber, coffee, tea, and sugarcane crops to cure interveinal chlorosis and boost yield.

• Field Crops & Vegetables: Ideal base fertilizer for potatoes, corn, wheat, soybeans, and fruit trees in acidic and magnesium-deficient soils.

• NPK & Fertilizer Blending: Acts as an excellent dry-blending raw material for custom NPK fertilizers due to its low moisture absorption and stable physical structure.

Partner with a Trusted Wholesale Kieserite Supplier

By sourcing Kieserite directly from Xingyu, you secure competitive factory-direct pricing, consistent quality, customized OEM branding, and flexible shipping options. We serve major agricultural markets across Southeast Asia, Latin America, Africa, and Europe.

Contact our international sales team today to request free product samples, technical datasheets, or the latest competitive wholesale quote!